1. ICRI Fall 2011 Convention John Weisbarth- The Euclid Chemical Co. Mick Honek- Geotechniques Inc. Current Methods and Technologies for Repairing Concrete Wastewater Treatment Facilities

2. What’s Unique with WWTP Concrete Repair ?

3. Current Methods and Technologies  Specifications  Real World Construction  Overcoming Installation Challenges

4. Concrete Repair Process  Evaluation  Correctly Written Specifications  Surface Preparation  Material Selection  Proper Installation

5. Material Properties  Compressive Strength  Modulus of Elasticity  Shrinkage  Freeze/Thaw Resistance  Bond Strength  Flexural Strength  Permeability  Impact & Abrasion Resistance  Coefficient of Thermal Expansion  Chemical Resistance  Sulfate Resistance

6. Application Criteria  Repair Thickness  Consistency  Set time  Viscosity  Ease to Place  Stickiness  Aggregate Extension

7. Materials  Patching Mortar  Rapid Set Repair Mortar  Crack Injection- Epoxy  Water Plug  Chemical Grout  Waterproofing Coating  Chemical Resistant Coatings

8. Seal Active Leaks Water Stops  Interior and Exterior  Below Grade Walls  Foundations  Reservoirs  Manholes  Tunnels

9. Seal “Weeping” Walls Waterproofing Coatings  Positive or Negative Side  Crystalline  Hardens in Seconds

10. Urethane Chemical Grout  Low Viscosity Urethane  Expands  Hydrophilic/Hydrophobic Stop Leaking Cracks

11. Crack Repair  Non-water Cracks  Dynamic Cracks  Static Cracks

12. Crack Injection

13. Coatings and Linings  Chemical Resistance  Flexible  High Build

14. WATER & WASTEWATER Challenges & Opportunities … A Contractor’s Perspective

15.  Aging Infrastructure  Overcoming Installation Challenges  Site Access/Mobilization  Site Conditions  Opportunities

16.  Old Structures  Lack of Maintenance  H 2 S Deterioration Aging Infrastructure

17.  Deteriorated concrete  Rusted & expanded reinforcing  Humidity in work spaces approaching 100%  Confined spaces  Access-challenged and congested work spaces WTP Challenges

18.  Tunnel flow can increase rapidly and unpredictably  Intermittently hazardous atmosphere (H 2 S)  Permit-required confined space protocols  Combined storm & sanitary flow (bio-hazard)  Entry by crane & man-basket only  Tunnel floor uneven (trip hazards) WWTP Challenges

24. Site Access

25. Confined Work Spaces

26. Equipment Mobilization

27. Jobsite Safety

29. Jobsite Conditions

31.  Seal Water Leaks  Concrete Repair  Epoxy Injection  Coatings Opportunities

35. Increasing Your Opportunities  Become involved in organizations that provide networking opportunities  Provide continuous training for your employees  Create project profiles, newsletters, brochures  Host an open house  Sponsor lunchbox seminars  Have a jobsite cookout

36.  Commit yourself to high quality work  Create relationships  Evaluate bidding services  When the economy slows, DO NOT cut back your marketing dollars  Learn to think so far outside of the box that you’re in danger of losing site of the box Increasing Your Opportunities

37. Success !

40. Current Methods and Technologies for Repairing Concrete Wastewater Treatment Facilities Questions ??